Internal-combustion device.



H. F. LEISSNER.

INTERNAL COMBUSTION ENGINE; APPUCATIGN FILED APR.19, I916.

Patented June 19, 1917.

UNITED STATES PA rEN'r orrlon HARRY FERDINANIF LEISSNER, OF'LJUSNE, SWEDEN.

INTERNAL-COMBUSTION ENGINE.

Specification n1 Iletters Patent.

.To all whom it may concern: I Be it known that I, HARRY FERDINAND Lrnssmtn, a citizen of the Kingdom of Sweden, residing at Ljusne, Sweden, have in vented. new and useful Improvements in InternalCombustion Engines; of which the following is a specification.

This invention rel ates to improvements in starting devices for internal combustion cnglues ol thegtype which are operated by an electrically ignited mixture of fuel and any but which after the start, operate by spontaneous ignition. or other non-electrle ignition.

In engines of this type it is of great importance, that immedtately after the startlng movement of the piston or the crank shaft, fuel and air be admitted to the comhustion chamber of the cylinder, and at the some time that then-fixture of fuel and air be prevented from entering any other place than said chamber. For this purpose the mixing of the fuel and air should be effected immediately before or simnltaneously with the entrance of the air into the combustion chamber, whereby such mixture may be introduced into the said chamber even at the first revolution 01": the crank shaft,

The objectof this invention is the provision of a fuel receptacle adapt-ed to be placed close to the apertnre through which the scavenging air enters the combustion chamber of the cylinder or in. close'proximity to said chamber, the said fuel receptacle delivering Without the aid. of any pump or other driving contrivance an approximately constant quantity of liquid fuel, each time the s'acavenging air enters the cylinder during on starting period The air mixed with liquid fuel is then lg nited electrically at the suitable moment.

This fuel. receptacle is especially distim guished by being provided with a U-shaped channel adapted to contain liquid fuel and thus forming a sort of liquid seal, one branch of which is connected with an air space in the receptacle, While the other branch connected with a channelor the like leading to the air loletof the engine or to {he colilbustion (*l'lfllllbfil.

An on'abodiment of the invention illusiml'l-d "in the accxi mlnlnying drawing in which l ignrc l a sectional. view of a fuel mu-oplur'lo v'nrhmltingr my invention, and l 'ii- :1 is 12, w-wll tHl view of an internal tho-outlet Ifi'intothe connectinggclumine "1;

PatentedJune 19, 1917.

Application 111m 15mm, 1916. Serial No. 92,273.

'The outlet 5 is connected withthe interior of the receptacle 1 by the branches 6 and 7 of a Ushaped channel, each of which branches has an e cea of passage squalor approximately eqmlll to that of the outlet-5,

the branch 7 having larger width than the outlet 5 and the branch 6, counted in thmdr rection at rlg to a plane through the branches, The lermost portion of the U-shaped channel forms an enlarged chamher t? connected with. the part of the receptacle 1 located outside thou-shaped channel through an aperture 9 whose... area of '75 passage is very small in relation tothe areas of the branches 6 and 7. V

Preferably the filling opening el is placed somewhat higher than the outlet 5, andtlle upper edge of the branch 7 somewhat higher thanvthe lower edge of the filling'opening 4. As a result liquid fuel may, when inn-o duccd hev caused .to enter theontlet 5, and theoranch 7 always opens above-thel'iquidlevel in the receptacle 1, the U-shapeduchan- 3 nel thus forming a sort of liquid seal The fuel" receptacle 1 is adapted to lie screwed either into the Wall of achannel 2 connecting the scavenging, pump of an internal con'lbustiml engine with ltscyl'lnder 0 in front of the inlet opening of sai chan nel, or directly into thewall of the cylinder in such manner, that the outlet- 5 OPUDrf-iiiln connecting channel :2 or directlyinto the cylinder. In Fl .2 the fuel. receptacle l 2 connecting the crank case 11 with the cyl inder 12, directly in front of the inlet-(meow When the engine to be started; sue -11 qmmtity ofia suitable liquid: fuel asQforl instance benzin, is introduced into'the cep=fl tuclo 1 that. a part of the ffflel'fiOjWS through?" \-vllorvnpon;the cover 3 is screwml Q]; lvrelofllu: l quld remaml'ugnt -receptu [(-1- A 'now expands is determined by the lower edge of the channo] 5, as is shown on the drawing. I1: then the piston is caused to move from its uppermost position, the air in the crank casing 11 as well as in the connecting channel 2'is compressed. It is to be supposed that the pressure amounts, on an average, to a pres sure above atmospheric of 0.2 to 0.3 kilogram or square centimeter. On account thereo ."air will be forced from the channel 2 through the inlet 5 and U-shaped channel into the air space above the fluid level at the same time carrying with it the liquid contained in the U-shaped channel 6, 7, except a' certain quantity which remains in the chamber 8, and compressing the air in said air space. It is further supposed that dur ing the further downward motion the piston first uncovers the cxhaust port 14% and then the inlet opening 13. When the piston uncovers the latter opening, the air compressed in the crank casing enters rapidly the cylinder through the channel 2, and, on account thereof, the pressure in the crank casing and the channel 2 decreases suddenly. The compressed air contained in the space above the liquid level in the receptacle 1 and is partly exhausted through the U-shaped channel and the outlet 5 at the same time carrying with it the quantity ofdiquid remaining in the chamber 8 or just flowing out of the opening 9. When in this manner a certain quantity of fuel has entered the channel 2, this fuel will be'carried along by the air flowing upward in said channel and will enter the cylinder, and owing thereto, an explosive mixture of liquid fuel and air is obtained therein, said mixture being ignited at a suitable moment .by means of an electric ignition device (not shown).

As stated above, the area of passage of the aperture 9 is very small in relation to the areas of the branches 6 and 7, and, therefore, the aperture 9 can not disturb the operation described of the outlet 5 and the branches 6 and .7 to any appreciable extent;

It will be gathered from the foregoing that the fuel receptacle is adapted for use only in connection with the starting of the engine.

Further it is to be observed that,-if the total quantity of fuel exhausted from the fuel receptacle 1 during a cycle of action should not enter the cylinder instantly, the

remaining quantity of fuel is located "so near to the inlet opening, that said quantity will necessarily be caused to partake in the next combustion. By .reasonlof the arrangement of the chamber 8 the quantity of liquid fuel taken up each time on flow of air from the receptacle 1 will be approximately constant and independent/of the speed of the engine.

" The size? the aperture'9 is, preferably,

so chosen that the interval of time between a flow of air from the receptacle 1 and the following how of air to said receptacle will suffice for filling the chamber 8 with liquid even at a great speed of the engine. The said interval is determined by the suction period of the air pump. The injection period of said .pump determining the time be tween the flow of air to the receptacle 1 and the flow back from the same, is always very short, and owing thereto any considerable quantity of liquid cannot flow during said period into the chamber 8. Therefore, the chamber 8 contains always on the flow of air from the receptacle 1 to the channel 2 a certain quantity of liquid.

The size of the receptacle 1 is so chosen, that it contains a quantity of liquid. fuel sufficient for starting the engine in question. When the engine commences to run, said quantity of liquid has been consumed, and

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In an internal comlmstion engine, a combustion chamber, a fuel receptacle adapted to be connected with the combustion. chamber and having a closed air space, a U-shaped channel positioned in said reeep-- tacle and connecting said closed air space with the combustion chamber, and a eonnection between said fuel receptacle and the lowermost part of said U-shaped channel.

2. In an internal combustion engine, a combustion chamber, a fuel receptacle adapted to be connected with the combustion chamber and having a closed air space, a. U-shaped channel positioned in said receptacle and connecting said closed air space with the combustion chamber, and counetition between said fuel receptacle and the lowermost part of the U-shaped channel, the area of passage of this connection being much smaller than that of the U-shaped channel.

3. In an internal combustion engine, acombustion chamber, a fuel receptacle adapted to be connected with the combustion chamber and havinga closed-air space, a U-shaped channelpa'rt'ly submerged into the fuel in said rece tacle, one branch of said U-shaped channel opening into said closed air space and the=other branch being connected with said combustion chamber, and a connection between said fuel receptacle and the lowermostpart of said U-shaped channel.

4. In an internal combustion. engine, a

- .conibustion chamber, and clo 'sxlfuel receptacle and the lowermost part of. the liquid seal, and a filling opening in the wall of thereceptacle.

5. In an internal combustion engine, a combuslnon chambet and closed fuel receptacle connected with the conibustion. chamher, an air space in said receptacle, aliquid seal in the receptacle containing a carbureting liquid andopening necting said air space with said combustion chamber, an enlargement ofthe lowermost part of said liquid seal, a connection between said receptacle and said enlargement, and'a '3 fillingopening in the wall of the receptacle.

In testimony'whereof I have my .name' HARRY Faammun am into said airspace above the liquid level, said liquid seal con- 

